Geometrical Optics Analysis Of A Retroreflector System Of Concentric Hemispherical Mirrors

Helmut E. Schrank

doi:10.1117/12.953790

1 March 1974 Geometrical Optics Analysis Of A Retroreflector System Of Concentric Hemispherical Mirrors

Helmut E. Schrank

Proceedings Volume 0039, Applications of Geometrical Optics II; (1974) https://doi.org/10.1117/12.953790
Event: Annual Technical Symposium, 1973, San Diego, United States

Abstract

A concave hemispherical mirror with a segment of a smaller concentric spherical mirror at the paraxial focal region of the larger mirror can be used as a retroreflector having some advantages over the commonly used corner reflector, i.e. wider angular response and lighter weight, the latter because no glass or other dielectric is required. Such a device has been successfully designed and built for microwave applications,4 and may also have utility for infra-red or optical systems requiring echoÃ¢â‚¬â€?enhancement. To determine the optimum radius of the smaller reflector relative to the larger hemisphere, a geometric optics analysis was performed with the aid of a UNIVAC 1107 computer. This gave a better understanding of the effects of spherical aberration on the echoing performance of the reflector system and helped to determine the size of the smaller reflector which gives the best compromise between reflectivity and aperture blockage.

Citation Download Citation

Helmut E. Schrank "Geometrical Optics Analysis Of A Retroreflector System Of Concentric Hemispherical Mirrors", Proc. SPIE 0039, Applications of Geometrical Optics II, (1 March 1974); https://doi.org/10.1117/12.953790

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KEYWORDS

Reflectors

Mirrors

Retroreflectors

Geometrical optics

Spherical lenses

Glasses

Microwave radiation

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